HOUSTON – MMAjunkie.com was on scene for today’s official fighter weigh-ins for UFC 166, where all but one fighter successfully made weight for Saturday’s card.

In the main event, heavyweight champion Cain Velasquez (12-1 MMA, 10-1 UFC) meets Junior dos Santos (16-2 MMA, 10-1 UFC) for the third time. Dos Santos took Velasquez’s title in November 2011 at UFC on FOX 1. Velasquez took the belt back this past December at UFC 155. He then defended it against Antonio Silva in May, while “JDS” beat Mark Hunt to set up the trilogy fight.

From a weight standpoint, the two will be evenly matched. Dos Satnos weighed in at 240 pounds, while Velasquez was 241. Velasquez is a 2-to-1 favorite in the fight.

The co-main event also features heavyweights as Daniel Cormier (12-0 MMA, 1-0 UFC) takes on Roy Nelson (19-8 MMA, 6-4 UFC). The fight will be Cormier’s last in the weight class before a planned move to light heavyweight. He was 224 pounds, while Nelson came in at 249.

And former Strikeforce lightweight champion Gilbert Melendez (21-3 MMA, 0-1 UFC) was 156 pounds for his fight with Diego Sanchez (24-5 MMA, 13-5 UFC), the Season 1 middleweight winner of “The Ultimate Fighter.” Sanchez also was 156. Their face-off was the most heated of the afternoon, with Melendez pounding on his own chest while Sanchez yelled at him.

Only Andre Fili, fighting in the UFC for the first time, failed to make weight. The featherweight took the fight on less than two weeks notice against Jeremy Larsen. The pair’s fight will be a catchweight, and Fili forfeits 20 percent of his purse to Larsen after coming in at 148.5 pounds.

All the other fighters on the card hit their target weights without issue for Saturday’s show, which is the UFC’s first in Houston since October 2011.

Friday’s weigh-ins took place at Toyota Center in Houston, the same venue that hosts Saturday’s card. UFC 166 has a five-fight main card on pay-per-view (10 p.m. ET) following four prelims on FOX Sports 1 (8 p.m. ET) and four on Facebook (6 p.m. ET).

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